What are the boards dimensions if you don't mind me asking? Would ideally like to mount this on a Euro sized panel.

The boards dimensions are 4.7" (121mm) x 4.7" (121mm)

Kind of large which is reason why I may want top go with with a two voice version in place of four OR keep four drum voices and use SMT parts in order to produce a smaller PC board. This could be a poll also but first want to see the interest in this.

I would be interested, would prefer through hole to SMT, would be open to two x two voices instead of one x four, if that makes life easier for our Euro friends, assuming it doesn't mean $56 for two boards .

I would be interested, would prefer through hole to SMT, would be open to two x two voices instead of one x four, if that makes life easier for our Euro friends, assuming it doesn't mean $56 for two boards Wink.

Only really interested in one at this time though.

LOL Oh my no ... ! OK, thanks for your input and you make a good point also in terms of fitting into smaller form factors.

Were you thinking of all smt components or just resistors and capacitors? I'd be happy to tackle passives with a soldering iron but would be nervous of trying a chip.

OK, with regards to the SMT, I will consider it but would really like to keep all components SMT. The chips would be SOIC and to be honest, I personally can solder those faster than any DIP IC and find it easier. You may just be surprised at just how easy it really is with no special equipment except a magnifier.

Well I guess I'd better not be such a wimp and go for the SMT chips as well I've been soldering since the late 80's so I should really b up to the task!

Oh your not alone really. I was in the same situation until finally about 4 years ago I had to learn how to solder the SMT hardware since many chips I use are not even in DIP or easy to solder packages. I ended up getting SMT training kits with dummy components, so to not destroy perfectly good components, and watched lots of training videos online. Finally, I practiced and learned.

I agree Matthias. I would say that 0805 sized passives and SOIC are probably the best for SMT starters AND they make circuit boards very compact by putting components on both sides. The are more affordable when getting manufactured additionally.

I already have all the bits needed for a build like this in my parts bin. None of them are SMD thought. I guess finding the LM13700 as SMD will limit the list of usual sources quite a bit. Builders outside US might prefer if there where a component kit available to them if this is happening with SMD. I know that this is the path I would have to take.

Hi Guys, I kept this going for a while and it looks like a fairly underwhelming response thus the Quad Bass++ is officially a dead project. I am sorry guys as these boards are getting more expensive to get manuafactured and with only two or three interested, it's a no brainer. I thank those who did respond.

I've got one board for the MPS I plan to build this winter.
How does the MPS compare to Bass++ ?

The few demos I've found on the net it looks like it's very easy to go wild with all the controls on the MPS. And not actually ending up with a drum sound. Although that can be very creative it could also be very annoying trying to get drum sounds from 4 channels.

No worries and totally understandable. Knocked up a stripboard layout a while ago and will put one together when I have time. To many other things on the go at the moment anyway. I can always lay out a pcb myself in the future if I need to.

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